If it is mainly a street driven car I would not do a Cal-Trac setup just because street driving will beat up the parts, as will moisture and dirt.

For the money I would use just a set of ESPO heavy duty springs and a pair of Lakewood slapper bars. My Valiant went 1.56 in the 60' and a 12:00@110 on Lakewood clamp-ons and ET Streets.

You could not give me a set of SS springs, but that's just me.